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incubator-nuttx
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include/nuttx/compiler.h: Correct support of C-version-specific features. Cannot depend on GCC version because -std=c89 may be used on comomand line. Need instead to use __STDC_VERSION__ to determine if a feature is supported. Also add conditional support inline, depending on C99.

This commit is contained in:
Gregory Nutt 2019-01-09 15:39:54 -06:00
parent fcb5273250
commit 7bf79759bb
1 changed files with 11 additions and 5 deletions
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16
include/nuttx/compiler.h
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@ -258,16 +258,22 @@
# undef CONFIG_PTR_IS_NOT_INT
#endif
/* GCC supports inlined functions */
/* GCC supports inlined functions for version C99 and above */
# define CONFIG_HAVE_INLINE 1
# if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
# define CONFIG_HAVE_INLINE 1
# else
# undef CONFIG_HAVE_INLINE
# define inline
# endif
/* ISO C11 supports anonymous (unnamed) structures and unions, added in
* GCC 4.6
* GCC 4.6 (but might be suppressed with -std= option)
*/
# undef CONFIG_HAVE_ANONYMOUS_STRUCT
# if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ > 5)
# undef CONFIG_HAVE_ANONYMOUS_UNION
# if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L
# define CONFIG_HAVE_ANONYMOUS_STRUCT 1
# define CONFIG_HAVE_ANONYMOUS_UNION 1
# endif
@ -647,7 +653,7 @@
# undef CONFIG_LONG_IS_NOT_INT
# undef CONFIG_PTR_IS_NOT_INT
# undef CONFIG_HAVE_INLINE
# define inline 1
# define inline
# undef CONFIG_HAVE_LONG_LONG
# define CONFIG_HAVE_FLOAT 1
# undef CONFIG_HAVE_DOUBLE